US protesters acquitted of terror charges

A US jury has acquitted three NATO summit protesters of breaking Illinois' rarely tested state terrorism law, but did convict them on lesser arson counts.

Prosecutors described the men - Brian Church, Jared Chase and Brent Vincent Betterly - as dangerous anarchists who were plotting to throw Molotov cocktails at President Barack Obama's campaign headquarters and other Chicago sites during the 2012 summit.

Undercover officers infiltrated the group and the men were arrested before the summit began.

Defence lawyers scoffed at the portrayal of their clients as terrorists.

They described them as drunken goofs who were goaded into the Molotov cocktail plot by the officers.

Nearly all terrorism cases are filed in federal court.

Many states passed terrorism laws after the September 11, 2001, attacks in what were seen as largely symbolic gestures.

The question of when a planned protest becomes conspiracy to commit terrorism was the focus of much of the trial, which was seen as a major test of whether states should more often take the lead in trying terrorist suspects.

Prosecutor Tom Biesty argued that two weeks of testimony from undercover police officers and secret recordings proved the activists conspired to attack the campaign office in Obama's home town, Mayor Rahm Emanuel's home and police stations.

"Were they bumbling fools or were they cold, calculating terrorists?" he asked.

"These men are terrorists."

Defence lawyer Thomas Durkin ridiculed the notion the three were any such thing.

Reaching into an exhibit box, Durkin lifted a slingshot that was among the items the activists brought to Chicago. Holding it up to jurors, he said mockingly, "A weapon of mass destruction. Tools of terrorism, for sure."

The outcome of the trial would be closely watched, Durkin said, precisely because many share his belief that prosecutors were overzealous in slapping the label 'terrorism' on the alleged crimes.